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To Ernst Haeckel 20 January 1873
Summary
On EH’s Die Kalkschwämme [1872].
Author: | Charles Robert Darwin |
Addressee: | Ernst Philipp August (Ernst) Haeckel |
Date: | 20 Jan 1873 |
Classmark: | Ernst-Haeckel-Haus (Bestand A-Abt. 1: 52/29) |
Letter no: | DCP-LETT-8743 |